Windows with a couple of development tools takes up about 126GB of my 128GB SSD, to free-up some space I followed the guide at: http://www.hanselman.com/blog/GuideToFreeingUpDiskSpaceUnderWindows81.aspx
Then I moved the "C:\ProgramData\Package Cache" used by Visual Studio to D:\.
I did this by following the instructions at: http://superuser.com/questions/455853/can-i-delete-the-the-folder-c-programdata-package-cache
1. Move folder from C:\ProgramData to D:\ProgramData
This must be a move of the complete “Package Cache” folder, so after move you will have a folder C:\ProgramData, that does NOT contain the folder “Package Cache”.
2. Create a filesystem junction: mklink /J "C:\ProgramData\Package Cache" "D:\ProgramData\Package Cache"
This will create a filesystem junction, that will point all software that wants to access "C:\ProgramData\Package Cache" to "D:\ProgramData\Packa Cache".
That alone saved me about 6GB.